From: Lizhi Xu lizhi.xu@windriver.com
stable inclusion from stable-v6.6.55 commit 84543da867c967edffd5065fa910ebf56aaae49d category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRCH CVE: CVE-2024-49965
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit c03a82b4a0c935774afa01fd6d128b444fd930a1 upstream.
Patch series "Misc fixes for ocfs2_read_blocks", v5.
This series contains 2 fixes for ocfs2_read_blocks(). The first patch fix the issue reported by syzbot, which detects bad unlock balance in ocfs2_read_blocks(). The second patch fixes an issue reported by Heming Zhao when reviewing above fix.
This patch (of 2):
There was a lock release before exiting, so remove the unreasonable unlock.
Link: https://lkml.kernel.org/r/20240902023636.1843422-1-joseph.qi@linux.alibaba.c... Link: https://lkml.kernel.org/r/20240902023636.1843422-2-joseph.qi@linux.alibaba.c... Fixes: cf76c78595ca ("ocfs2: don't put and assigning null to bh allocated outside") Signed-off-by: Lizhi Xu lizhi.xu@windriver.com Signed-off-by: Joseph Qi joseph.qi@linux.alibaba.com Reviewed-by: Heming Zhao heming.zhao@suse.com Reviewed-by: Joseph Qi joseph.qi@linux.alibaba.com Reported-by: syzbot+ab134185af9ef88dfed5@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=ab134185af9ef88dfed5 Tested-by: syzbot+ab134185af9ef88dfed5@syzkaller.appspotmail.com Cc: Mark Fasheh mark@fasheh.com Cc: Joel Becker jlbec@evilplan.org Cc: Junxiao Bi junxiao.bi@oracle.com Cc: Changwei Ge gechangwei@live.cn Cc: Gang He ghe@suse.com Cc: Jun Piao piaojun@huawei.com Cc: stable@vger.kernel.org [4.20+] Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Tong Tiangen tongtiangen@huawei.com --- fs/ocfs2/buffer_head_io.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c index 196638a22b48..a71b40065e8b 100644 --- a/fs/ocfs2/buffer_head_io.c +++ b/fs/ocfs2/buffer_head_io.c @@ -235,7 +235,6 @@ int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr, if (bhs[i] == NULL) { bhs[i] = sb_getblk(sb, block++); if (bhs[i] == NULL) { - ocfs2_metadata_cache_io_unlock(ci); status = -ENOMEM; mlog_errno(status); /* Don't forget to put previous bh! */